Cell towers in Marion County, IN

The FCC registry lists 245 constructed antenna structures in Marion County, 6% of Indiana's 3,783 — one of the three most in the state. Ownership is spread across 78 registrants; the largest, Crown Castle, has 57 (23%). The three big tower companies — American Tower, Crown Castle and SBA — hold 105 between them.

Value a buyout offer

1Constructed structures 245
2Tallest 1048 ft
3Largest owner Crown Castle
4Median height (state 255 ft) 160 ft

Structures

245

rank 1 of 92 in IN

Most common type

Tower

33% of structures

Over 200 feet

23% of structures

Peak build decade

1990s

40% built then

Who owns the towers in Marion County

78 different registrants own the 245 structures. One is registered to an individual or family trust, whose name this site withholds. Owner names are the registrant's legal entity as filed with the FCC; the large tower companies file under many subsidiary names, which this site groups into families where the brand is in the name or listed in the company's SEC filings.

Constructed structures in Marion County by owner group, bars to scale. Source: FCC ASR, October 2026.

Height and age

The median structure here stands 160 feet, 95 feet shorter than the Indiana median, typical of denser areas where more, shorter sites fill in coverage. The tallest is a tower near Indianapolis at 1048 feet, built in 1994. More than in any other decade, 40% were built in the 1990s.

Structures in Marion County by type, bars to scale. Source: FCC ASR.

Structures in Marion County by decade built, columns to scale. Source: FCC ASR.

Every registered structure

Sorted tallest first. The registration number opens the FCC record, which shows the exact location and the owner's contact for the structure. A tower on your land that is not in this list is probably under 200 feet and away from airports, so it did not need registering — see why some towers aren't listed.

FCC reg.	Type	Height	Built	City	Owner
1030817	Tower	1048 ft	1994	Indianapolis	CCB License, LLC
1030684	Guyed tower	1040 ft	1984	Indianapolis	Tribune Media Company
1029312	Tower	1028 ft	1954	Indianapolis	CCB License, LLC
1253064	Guyed tower	1010 ft	2006	Indianapolis	American Towers LLC
1031014	Tower	997 ft	1956	Indianapolis	VB-S1 Assets, LLC
1030144	Tower	995 ft	1979	Indianapolis	Subcarrier Communications Inc
1026780	Guyed tower	891 ft	1980	Indianapolis	Vertical Bridge CC FM, LLC
1027896	Other or unspecified	876 ft	2018	Indianapolis	METROPOLITAN INDIANAPOLIS PUBLIC MEDIA, INC.
1303336	On a building	829 ft	2017	Indianapolis	SFT Property LLC
1031298	Guyed tower	820 ft	2007	Indianapolis	American Towers LLC
1029545	Guyed tower	694 ft	1985	Acton	Subcarrier Communications Inc
1027512	Guyed tower	523 ft	2002	Indianapolis	VB Nimbus, LLC
1031130	Other or unspecified	512 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1027224	Other or unspecified	510 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1025639	Guyed tower	477 ft	2016	Indianapolis	INDIANAPOLIS POWER & LIGHT CO
1030816	Tower	472 ft	1954	Indianapolis	VB-S1 Assets, LLC
1027669	Tower	469 ft	1980	Indianapolis	Indiana, State of (IPSC)
1241160	Tower	468 ft	2004	Indianapolis	VB Nimbus, LLC
1027226	Tower	466 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1048056	Other or unspecified	465 ft	1964	Indianapolis	Radio One Licenses, LLC
1048057	Other or unspecified	465 ft	1964	Indianapolis	Radio One Licenses, LLC
1026778	Other or unspecified	432 ft	1924	Indianapolis	Capstar Radio Operating Company
1026779	Other or unspecified	432 ft	1924	Indianapolis	Capstar Radio Operating Company
1027227	Tower	406 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1260893	On a building	395 ft	2007	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1030193	Lattice tower	386 ft	1963	Indianapolis	Continental Broadcast Group, LLC
1028751	Lattice tower	375 ft	1994	Indianapolis	American Towers LLC
1245484	Lattice tower	369 ft	2019	Clermon	K-LOVE, Inc.
1028753	On a building	354 ft	1990	Indianapolis	Bible Broadcasting Network, Inc.
1036837	Other or unspecified	332 ft	2007	Indianapolis	VB Nimbus, LLC
1036838	Other or unspecified	332 ft	2007	Indianapolis	VB Nimbus, LLC
1036075	Tower	305 ft	1972	Zionsville	Panhandle Eastern Pipe Line Company, LP
1026128	Guyed tower	301 ft	1956	Indianapolis	American Towers LLC
1030758	Lattice tower	300 ft	2024	Indianapolis	VideoIndiana, Inc.
1030809	Tower	300 ft	1990	Indianapolis	CITIZENS GAS & COKE UTILITY
1028893	Tower	299 ft	1994	Camby	Crown Castle GT Company, LLC
1027670	On a building	292 ft	1996	Indianapolis	Indiana, State of (IPSC)
1027228	Tower	286 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1027595	On a building	283 ft	1985	Indianapolis	INDIANA, STATE OF
1010045	Tower	268 ft	1970	Indianapolis	KITLEY PROPERTY LLC
1203338	Tower	268 ft	1970	Indianapolis	Private owner (name withheld)
1028687	Tower	263 ft	1993	Indianapolis	Crown Castle GT Company, LLC
1260743	Tower	252 ft	2007	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1202656	Other or unspecified	244 ft	1948	Indianapolis	Creative Data Management, Inc.
1031194	Tower	238 ft	1983	Indianapolis	TOWER COMMUNICATIONS SYSTEMS CORP
1063828	Tower	238 ft	1983	Indianapolis	TOWER COMMUNICATION SYSTEM
1039722	Lattice tower	231 ft	1991	Indianapolis	Crown Castle South LLC
1203132	Tower	230 ft	1999	Indianapolis	J.E.S. & Sons Inc
1039768	Tower	228 ft	1995	Indianapolis	AT&T Mobility Spectrum LLC
1203342	On a building	228 ft	1984	Beech Grove	SISTERS OF ST. FRANCIS HEALTH SVCS.
1025638	On a building	218 ft	1959	Indianapolis	INDIANAPOLIS POWER & LIGHT CO
1026777	Other or unspecified	216 ft	1924	Indianapolis	Capstar Radio Operating Company
1027225	Tower	215 ft	1991	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1039724	Mast	206 ft	2003	Lawrence	Crown Castle South LLC
1039720	Mast	205 ft	1991	Indianapolis	Crown Castle South LLC
1234096	Tower	205 ft	2003	Indianapolis	Indiana Department of Transportation
1039721	Lattice tower	203 ft	1991	Indianapolis	Crown Castle South LLC
1028692	Tower	199 ft	1990	Indianapolis	Crown Castle GT Company, LLC
1039713	Tower	199 ft	1988	Indianapolis	CCATT LLC
1207990	Tower	199 ft	1990	Indianapolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1221046	Tower	199 ft	2001	Indianapolis	T-Mobile USA Tower LLC
1240561	Tower	199 ft	2003	Newton	T-Mobile USA Tower LLC
1297254	Monopole	199 ft	2015	Indianapolis	Horvath Towers III, LLC
1028475	Tower	198 ft	1961	Indianapolis	Pinnacle Towers Acquisition LLC
1061807	Tower	198 ft	1983	Indianapolis	J E S & SONS INC
1028698	Tower	196 ft	1989	Castleton	Crown Castle GT Company, LLC
1046086	Pole	196 ft	1998	Indianapolis	CCATT LLC
1245609	Tower	196 ft	2004	Indianapolis	Crown Castle GT Company, LLC
1202525	Monopole	195 ft	1948	Indianapolis	American Towers LLC
1234097	Tower	195 ft	2003	Indianapolis	Indiana Department of Transportation
1235629	Monopole	195 ft	2013	Indianapolis	American Towers LLC
1318182	Monopole	195 ft	2015	Indianapolis	Skyway Towers, LLC
1259235	Lattice tower	194 ft	2007	Indianapaolis	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1276060	Pole	194 ft	2002	Indianapolis	CCATT LLC
1051117	Lattice tower	192 ft	1998	Indianapolis	American Towers LLC
1051645	Lattice tower	192 ft	2002	Indianapolis	American Towers LLC
1051652	Tower	192 ft	1998	Indianapolis	American Towers LLC
1025637	Tower	191 ft	1995	Indianapolis	INDIANAPOLIS POWER & LIGHT CO
1231235	Tower	191 ft	1989	Indianapolis	Crown Castle GT Company, LLC
1288956	Monopole	191 ft	1999	Indianapolis	American Towers LLC
1028681	Tower	190 ft	1992	Indianapolis	Crown Castle GT Company, LLC
1056597	Tower	188 ft	1998	Indianapolis	Global Tower, LLC. through American Towers, LLC
1282307	Pole	188 ft	1999	Indianapolis	CCATT LLC
1028685	Monopole	186 ft	1992	Indianapolis	Crown Castle GT Company, LLC
1237183	Tower	185 ft	2003	Indianapolis	T-Mobile USA Tower LLC
1325106	Monopole	184 ft	1997	Indianapolis	Phoenix Tower International
1058641	Monopole	183 ft	1997	Indianapolis	American Towers LLC
1211746	Pole	183 ft	1998	Indianapolis	CCATT LLC
1057432	Tower	180 ft	1998	Indianapolis	Pinnacle Towers Acquisition LLC
1218404	Tower	180 ft	1975	Indianapolis	Colgate Enterprises Inc
1234090	Tower	180 ft	2003	Indianapolis	Indiana Department of Transportation
1234093	Tower	180 ft	2003	Indianapolis	Indiana Department of Transportation
1237184	Tower	180 ft	2003	Indianapolis	T-Mobile USA Tower LLC
1059520	Lattice tower	179 ft	1998	Indianapolis	American Towers, LLC
1204069	Tower	179 ft	1999	Indianapolis	STC Five LLC
1278559	Tower	179 ft	2011	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1042920	Lattice tower	178 ft	1997	Indianapolis	Pinnacle Towers Acquisition LLC
1059552	Mast	178 ft	1998	Lawrence	American Towers, LLC
1317991	Monopole	175 ft	2021	Indianapolis	TowerCo 2013 LLC
1023475	Other or unspecified	172 ft	1995	Indianapolis	Pinnacle Towers Acquisition LLC
1023476	Other or unspecified	172 ft	1995	Indianapolis	Pinnacle Towers Acquisition LLC
1057807	Tower	170 ft	1999	Indianapolis	Pinnacle Towers Acquisition LLC
1213549	Monopole	170 ft	2000	Indianapolis	American Towers LLC
1232752	Lattice tower	170 ft	2006	Speedway	American Towers LLC
1279297	Tower	170 ft	1998	Castleon	SpectraSite Communications, LLC. through American Towers, LLC.
1260181	Tower	167 ft	2007	Lawrence	INDIANAPOLIS DIVISION OF PUBLIC SAFETY COMMUNICATIONS
1294102	Lattice tower	166 ft	2015	Indianapolis	Horvath Towers III, LLC
1008185	Pole	165 ft	1996	Indianapolis	Crown Castle GT Company, LLC
1028897	Tower	165 ft	1993	Indianapolis	Crown Castle GT Company, LLC
1051648	Monopole	165 ft	1998	Indianapolis	American Towers LLC
1234069	Tower	165 ft	2003	Indianapolis	Indiana Department of Transportation
1236780	Tower	165 ft	2003	Indianapolis	Indiana Department of Transportation
1237375	Tower	165 ft	2003	Indianapolis	Indiana Department of Transportation
1293813	Monopole	165 ft	2015	Indianapolis	American Towers LLC
1310235	Monopole	165 ft	2019	Indianapolis	VB BTS III, LLC
1206606	Tower	164 ft	2011	Indianapolis	Indiana Deparment of Homeland Security
1051653	Monopole	163 ft	1998	Indianapolis	American Towers LLC
1290952	Monopole	162 ft	2002	Indianapolis	T-Mobile USA Tower LLC
1028905	Lattice tower	161 ft	1992	Indianapolis	Crown Castle GT Company, LLC
1051116	Monopole	161 ft	1998	Indianapolis	American Towers LLC
1051654	Tower	161 ft	1998	Indianapolis	American Towers LLC
1234072	Tower	161 ft	2003	Indianapolis	Indiana Department of Transporatation
1000869	Guyed tower	160 ft	1996	Lawrence	Crown Castle South LLC
1051649	Monopole	160 ft	1998	Indianapolis	American Towers LLC
1051658	Monopole	160 ft	1998	Indianapolis	American Towers LLC
1222291	Tower	160 ft	2002	Indianapolis	T-Mobile USA Tower LLC
1254633	Monopole	160 ft	2006	Lawrence	SBA Monarch Towers I, LLC
1255856	Monopole	160 ft	2006	Indianapolis	T-Mobile USA Tower LLC
1278773	Tower	159 ft	1997	Indianapolis	STC Five LLC
1028960	Pole	158 ft	1997	Indianapolis	AMERITECH WIRELESS. INC.
1027699	Lattice tower	158 ft	1998	Indianapolis	CCATT LLC
1034160	Pole	158 ft	1998	Indianapolis	CCATT LLC
1051646	Tower	158 ft	1998	Indianapolis	American Towers LLC
1051650	Monopole	158 ft	1998	Indianapolis	American Towers LLC
1060776	Mast	158 ft	1998	Indianapolis	SpectraSite Communications, LLC. through American Towers, LLC.
1214493	Pole	158 ft	2000	Indianapolis	New Cingular Wireless, Inc.
1292611	Pole	158 ft	2014	Indianapolis	American Towers LLC
1002411	Tower	157 ft	1996	Indianapolis	STC Five LLC
1003000	Tower	157 ft	1997	Southport	STC Five LLC
1051651	Mast	157 ft	1998	Indianapolis	American Towers LLC
1280744	Tower	157 ft	1997	Indianapolis	STC Five LLC
1027761	Monopole	156 ft	1997	Indianapolis	American Towers LLC
1054434	Monopole	156 ft	1998	Indianapolis	American Towers LLC
1269226	Monopole	156 ft	2006	Indianapolis	SBA 2012 TC Assets, LLC
1301207	Monopole	156 ft	2016	Indianapolis	VB BTS III, LLC
1318143	Monopole	155 ft	2016	Indianapolis	Skyway Towers, LLC
1318184	Monopole	155 ft	2016	Indianapolis	Skyway Towers, LLC
1333717	Monopole	155 ft	2026	Indianapolis	B-Mac Properties LLC
1059550	Monopole	154 ft	1998	Indianapolis	American Towers LLC
1036349	Monopole	153 ft	1998	Indianapolis	American Towers LLC
1051655	Monopole	153 ft	1998	Indianapolis	American Towers LLC
1057484	Tower	151 ft	1998	Indianapolis	Pinnacle Towers Acquisition LLC
1280466	Monopole	151 ft	2018	Indianapolis	Tower Development Corporation
1042094	Tower	150 ft	1998	Indianapolis	Comcast of Indianapolis, L.P.
1202527	Monopole	150 ft	2015	Indianapolis	American Towers LLC
1234094	Tower	150 ft	2003	Indianapolis	Indiana Department of Transportation
1267621	Pole	150 ft	2009	Beech Grove	SBA Monarch Towers III, LLC
1280370	Pole	150 ft	2011	Speedway	Crown Castle South LLC
1284074	Pole	150 ft	1991	Indianapolis	CCATT LLC
1291005	Monopole	150 ft	2017	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1302275	Monopole	150 ft	2017	Indianapolis	Charles S Hayes Inc dba Hayes Towers
1318136	Monopole	150 ft	2016	Indianapolis	Skyway Towers, LLC
1039729	Mast	149 ft	1994	Indianapolis	Crown Castle South LLC
1202142	Monopole	149 ft	1998	Beech Grove	T-Mobile USA Tower LLC
1202206	Tower	148 ft	1998	Indianapolis	PTI US TOWERS I, LLC
1000873	Pole	147 ft	1995	Indianapolis	CCATT LLC
1315304	Monopole	145 ft	2020	Indianapolis	Diamond Towers V LLC
1058643	Pole	144 ft	1997	Indianapolis	American Towers, LLC
1245019	Lattice tower	144 ft	1994	Indianapolis	Crown Castle South LLC
1288026	Monopole	143 ft	2013	Indianapolis	AT&T Mobility Spectrum LLC
1281246	Monopole	142 ft	2000	Lawrence	Crown Castle South LLC
1054603	Monopole	141 ft	1998	Indianapolis	American Towers LLC
1025636	Tower	140 ft	1975	Indianapolis	INDIANAPOLIS POWER & LIGHT CO
1039734	Monopole	140 ft	1993	Indianapolis	Crown Castle South LLC
1230979	Tower	140 ft	2002	Indianpolis	Crown Castle South LLC
1297330	Monopole	140 ft	2024	Indianapolis	PI Tower Development LLC
1267465	Monopole	136 ft	2009	Beech Grove	SBA Monarch Towers III, LLC
1206256	Lattice tower	135 ft	1996	Indianapolis	Crown Castle South LLC
1227858	Tower	135 ft	2002	Indianapolis	STC Five LLC
1318036	Monopole	135 ft	2019	Indianapolis	Skyway Towers, LLC
1028906	Pole	134 ft	1996	Indianapolis	Crown Castle GT Company, LLC
1201657	Pole	134 ft	1999	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1222891	Tower	134 ft	2000	Fishers	American Towers LLC
1300331	Lattice tower	134 ft	1998	Indianapolis	Crown Castle South LLC
1302161	Monopole	131 ft	2017	Indianapolis	Crown Castle GT Company, LLC
1234075	Tower	130 ft	2002	Indianapolis	STC Five LLC
1309927	Monopole	130 ft	2019	Indianapolis	VERTICAL BRIDGE TOWERS V, LLC
1316407	Monopole	130 ft	2021	Indianapolis	TowerCo 2013 LLC
1203660	Tower	128 ft	2000	Indianapolis	TVT III, LLC
1217047	Pole	128 ft	2000	Indianapolis	OpenLink Partners LLC
1296477	Monopole	128 ft	2016	Indianapolis	Crown Castle GT Company, LLC
1002412	Tower	127 ft	1997	Indianapolis	STC Five LLC
1261278	Monopole	127 ft	2008	Indianapolis	SBA Monarch Towers III, LLC
1003003	Tower	126 ft	1997	Indianapolis	STC Five LLC
1003914	Pole	126 ft	1997	Indianapolis	STC Five LLC
1031670	Lattice tower	126 ft	2017	Indianapolis	Crown Castle South LLC
1205251	Pole	126 ft	1999	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1270865	Monopole	126 ft	2003	Indianapolis	SBA 2012 TC Assets, LLC
1039743	Monopole	125 ft	1994	Indianapolis	Crown Castle South LLC
1304357	Monopole	125 ft	2017	Indianapolis	Vertical Bridge Development, LLC
1010229	Tower	124 ft	1997	Indianapolis	STC Five LLC
1039735	Mast	124 ft	1994	Indianapolis	Crown Castle South LLC
1051656	Monopole	124 ft	1998	Indianapolis	American Towers LLC
1002699	Tower	123 ft	2003	Wayne	STC Five LLC
1241835	Tower	120 ft	2003	Indianapolis	Tribune Media Company
1299436	Monopole	120 ft	2016	Indianapolis	Capital Telecom Holdings LLC
1252090	Pole	116 ft	2006	Indianapolis	Crown Castle South LLC
1007175	Lattice tower	115 ft	1997	Indianapolis	SBA Towers III LLC
1213710	Tower	115 ft	2005	Indianapolis	Crown Castle Tower 05 LLC
1213711	Monopole	115 ft	2005	Indianapolis	Crown Castle Tower 05 LLC
1299334	Monopole	115 ft	2019	Indianapolis	SBA Towers IX, LLC
1299453	Monopole	115 ft	2016	Indianapolis	K2 Towers III, LLC
1028684	Pole	114 ft	1996	Indianapolis	Crown Castle GT Company, LLC
1028695	Pole	114 ft	1996	Indianapolis	Crown Castle GT Company, LLC
1043177	Lattice tower	113 ft	2001	Lawrence	Crown Castle South LLC
1270864	Monopole	111 ft	2001	Indianapolis	SBA 2012 TC Assets, LLC
1304354	Monopole	109 ft	2018	Indianapolis	Vertical Bridge Development, LLC
1234572	Monopole	100 ft	2005	Indianapolis	Crown Castle South LLC
1247381	Tower	100 ft	2005	Indianapolis	Duke Energy Business Services, llc
1299948	Monopole	100 ft	2017	Indianapolis	Crown Castle South LLC
1306051	Monopole	100 ft	2018	Indianapolis	Vertical Bridge Development, LLC
1065011	Tower	98 ft	1998	Indianapolis	MSD OF DECATUR TOWNSHIP DBA = PINNACLE COMMUNICATIONS INC
1283785	Pole	97 ft	1997	Indianapolis	Octagon Towers, LLC
1308725	Monopole	95 ft	2019	Indianapolis	Horvath Towers V, LLC
1018483	Pole	92 ft	1997	Indianpolis	Crown Castle South LLC
1319404	Lattice tower	90 ft	2021	Indianapolis	CSX Transportation
1284566	Pole	88 ft	1999	Indianapolis	Crown Castle South LLC
1281730	Monopole	84 ft	1999	Indianapolis	Crown Castle South LLC
1211398	Tower	79 ft	2000	Greenwood	STC Five LLC
1328270	Monopole	70 ft	2024	Indianapolis	Harmoni Towers LLC
1313967	Pole	50 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313525	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313567	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313649	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313650	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313689	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313936	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1315001	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1315721	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1315861	Pole	47 ft	2021	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1315878	Pole	47 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1313861	Pole	39 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1315449	Pole	39 ft	2020	Indianapolis	GTE Mobilnet of Indiana Limited Partnership
1271332	Tower	31 ft	2009	Indianapolis	Indianapolis Airport Authority
1236583	Mast	30 ft	2003	Greenwood	Greenwood, City of

If you have a tower lease in Marion County

Find your structure above, open its FCC record and confirm the owner — that is the company your lease runs to today, even if a different carrier signed it originally. Before answering a buyout offer, put your current rent, escalator and remaining term into the calculator to see what the rent is worth and what return the offer assumes.

Counties in Indiana with similar tower counts: Lake County (199), Allen County (134), St. Joseph County (118), Elkhart County (113).

Source: FCC Antenna Structure Registration, weekly public access file (r_tower.zip, created 2026-10-18); constructed registrations only; locations rounded. Checked 2026-10-23. Methodology.